`react-doctor/r3f-no-manual-canvas-resize`

Manual resize loop for an R3F-owned renderer

Category: Performance
Severity: warn
Source: oxlint-plugin-react-doctor
Framework: global
Enabled when: react, r3f
Tags: r3f, webgl
Default: Enabled

Validate the diagnostic

Confirm the reported code matches this rule before you edit it.

Confirm the reported code matches react-doctor/r3f-no-manual-canvas-resize. Compare it with the Before example and verify the same API, framework, and execution context. Treat it as a false positive only when one of those conditions differs.

Compare the code

The corrected pattern shows a focused way to address the diagnostic.

Reported pattern

const Scene = () => {
  const gl = useThree((state) => state.gl);
  useEffect(() => {
    const resize = () => gl.setSize(innerWidth, innerHeight);
    addEventListener("resize", resize);
    return () => removeEventListener("resize", resize);
  }, [gl]);
  return <mesh />;
};

Corrected pattern

const Scene = () => <mesh />;

How to fix

Use the corrected pattern as a reference. Preserve behavior that the rule does not require you to change.

Copyable fix prompt

Copy this self-contained prompt into your coding agent after you confirm the diagnostic.

Fix every confirmed react-doctor/r3f-no-manual-canvas-resize diagnostic in the current repository. Required change: - Let Canvas and its ResizeObserver own renderer sizing instead of registering a window resize loop.

Reference transformation:Before:

const Scene = () => {
  const gl = useThree((state) => state.gl);
  useEffect(() => {
    const resize = () => gl.setSize(innerWidth, innerHeight);
    addEventListener("resize", resize);
    return () => removeEventListener("resize", resize);
  }, [gl]);
  return <mesh />;
};

After:

const Scene = () => <mesh />;

Constraints: - Confirm the reported code matches the Before pattern. - Make the smallest change that fixes the root cause. - Preserve behavior and interfaces unrelated to this diagnostic. - Reuse existing project components, utilities, and conventions. - Do not introduce render-phase side effects, render-phase state updates, or Hooks rule violations. - Preserve resource ownership and cleanup. Do not move work into a hotter render or frame path. - Adapt identifiers and framework details instead of copying blindly. - Do not disable the rule or suppress matching code. - Confirm this rule is enabled for the project: react, r3f. Verification: - Run focused tests for the changed behavior. - Run React Doctor and confirm this diagnostic no longer appears. - Report the files changed and any checks you could not run.

More Performance rules from the rules reference:

react-doctor/r3f-no-new-in-use-frame: Allocation inside useFrame
react-doctor/r3f-no-recursive-raf-with-use-frame: Competing animation loop alongside useFrame
react-doctor/r3f-no-state-in-pointer-move: React state update inside an R3F pointer-move handler
react-doctor/r3f-no-state-in-use-frame: React state update inside useFrame
react-doctor/r3f-no-sync-readback-in-use-frame: Synchronous readback inside useFrame

react-doctor/r3f-no-manual-canvas-resize